Java interview questions: - What are the functions present in Queue interface?

This is one of the typically asked  Java interview questions in most of the Java interview.

• public boolean offer(Object element): return false if the object cannot be added to the collection due to size issue and without throwing unchecked exception.

• public Object remove(): behaves like the Collection interface version.

• public Object poll(): behaves just like remove() but when invoked on empty collection returns null without throwing exception.

• public Object element(): for querying the element at the head of the queue. Throws exception when a collection is empty.

• public Object peek(): for querying the element at the head of the queue. Returns null if the collection is empty.

Also see Batch Processing video in Hibernate of  Java interview questions



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